Let back control



Sept. 23, 1952 RINNE ET AL LET BACK CONTROL Original Filed April 2, 19473 Sheets-Sheet l ATTORNEY 3 Sheets-Sheet 2 J. RINNE ETAL LET BACKCONTROL Sept. 23, 1952 Original Filed April 2, 1947 ATTORNEY Sept. 23,1952 J. RINNE ET AL 2,611,395

' LET BACK CONTROL Original Filed April 2, 1947 3 Sheets-Sheet 3 H.SHTON G. MALLARD GERARD LAKE .BY j

ATTORNEY the take-up gear transmission .unit.

. lines 1-! of Fig.

Patented Sept. 23, 1952 7 LET'BACK CONTROL John Rinne,"Staten Island, N.Y.; Everett H. Ashlton Allston andyfiobert G. Mallard, Hopedale,

..Mass.,.: and; Francis GerardLake,.New York,

N. Y., assignors, by, mesnev assignments, to Steel and Alloy Tank.Company, .Newark,'N. J., a corporation of New Jersey Originalapplication; April 2, 1947,." Serial No.

739,004, now Patent No. 2,518,185,-dated August 8, 1950..;..Divided andthis application Feb- 1. wary-3, 1950,; Serial No. 142,203

The present invention relates .to. .a fcloth roll take-up mechanism forlooms. and is adivision of application serial No. 739,0(14,filedYApril-l 1947, now Patent Number 2,518,185

In the usual automatic type Yofloom, when the filling is absent byreason of breakage or-zexhaust of the running supply, the takesup. geartransmission is automatically reversedby .the tension of the cloth, toeflect thedesiredJet-baclr-oisaid cloth, and thereby prevent theformationof thin streaks in said .cloth.

One object of the. presentinvention is.to provide new and improvedmeans, effectivelyqcontrolled and operated to limit the extent of. leback of the'take-up roll upon detection of failure of filling, andaccessibly mounted for ready inspection, repair or replacementswithrespeet-to The take-up roll is usua11y..-mounted-in a. manner topermit its elevation to be adjusted with respect to the warp line, inaccordance .with the desired cover of thecloth;

Another object of the present-inventionis to provide new and improvedmeans forrigidly. and firmly mounting the take-up roll-in a manner whichwill permit the elevationof said roll to be easily, quickly andaccurately adjusted withrespect to the warp line.

Various other objects 'of ,the invention .willbe apparent fromthefollowingv particular description, and from an inspectionof theaccompanying drawings, in which:

Fig. 1 is a front view of theleft-hand side of a loom embodying thefeatures of the; present invention, certain parts of said loom notrelated to take-up roll 12 in the-"mannerto -be described,

and is frictionally-driven thereby torwindthe the present inventionbeing-absentfromthe view for the purpose of clarity;

Fig. 2 is a side view of the-loom taken app foximatelyalong the lines 22of Fig. 1. andshowing mainly the gear box for the take-up mechanism andthe let-back control mechanism; 7

Fig. 3 is a section of the loom taken-approximately along thelines-3-3.of Fig. .2;

Fig. 4 is a front view of part of the take-up gear box;

Fig. 5 is a section ofthe take-upmechamsm taken approximately along the.lines- 5?5 of Fig. 4;

Fig. 6 is a section ofv the take-upmechamsm taken along lines 6-6 ofFig-.5;

Fig. '7 is a side view of a section of the take-up gear transmissiontaken approximatelyalongthe 3, andshown with. the take-up roll adjustedin itslower position .accordingto thenature of c1oth.cover. desired;

Fig. 8. is a section of the loom takenapprox-i mately along the lines-8-8-of- Fig. l,-but showing mainly the.pressure-takemp-roll structure,the cloth roll structure andthedrive input end of the take-up geartransmission near the end .of cloth winding operation; I

Fig. 9 is a section of'the take-uproll structure taken approximatelyalong thel-inesdof- Fig. 8; and I 7 Fig. 10 is a detailsectionorthebeari-ng-structure atone end of the take-uproll talren on linesReferring to thedrawings,and especiallyto Fig. l, the loom frame may-be-;of--the conventionaltype, butis desirably of the improvedform shownin copending application, '-=SerialNo.

691;.237, filed August-17; 1946, now-Patent-Numsupported on-the-loomsides -in-- a I manner to be more fully described,- andcovered-withsandpaper or similar rough surfaced material-adapted to'frictionallygrip the cloth A afteritis formed and" advance ittowardsthe cloth I roll --I 3. *The cloth 'roll I3 is pressed --intocontact .-with-.: the

cloth-around said roll -l3. 1

The take-up rolll2-has..secured.to the ends thereof "gudgeons- Wand-l5(Figs. 1, 9): journalled in suitable bearings on th insideirame Weiss5310. --One of the gudgeons l 4 on the. left-hand doomside has securedthereto between: the .two: frame webs lfl and H (Fig; 1) a geargltrbywhichithe take-up roll 12 is continuously driven as the clothi formed.'The-take-upzrolhgear:clfiiris 1 driven from the crank shaft of i theloom (not shown), whichextendsparallel to-the'axis of. the

' take-'up-roll I2, andwhich drivesthrough a pair of intermeshing gearsnot shown) a ShOrt iplCK came-shaft li (Fig. 8) below--said orank shafton box or casing 25 formed'w-ith a peripheral wallflfi,

extendingthrough an opening 21 in-the-puter frame web H. 'Thegear x15has amounting 3 flange 30 abutting the outer face of the frame web IIaround the web frame opening 21, and is closed at its left-hand side bya plate wall 28 secured to said flange 30 and to said frame web II bymeans of screw studs 3I. The plate wall 28 is provided with a flangedopening 33 closed by a removable cover plate 34 supported in position bymeans of screw studs 35. The cover plate 34 is in readily accessibleosition and can be removed to permit access to the interior of the gearbox 25, as for example, for the purpose of changing the speed ratioaccording to the desired pick. The cover plate 34 is desirably oftransparent material to serve as a window, so that the interior of thegear box 25 can be easily observed.

The gear box 25 is provided with a partition wall 31 serving as a framesupport for certain of the bearings of the shafts of the take-uptransmission traln, and has an outer wall 38 on its right-hand side,serving'as a support for the bearings of some of the shafts of the geartrain.

On the right-hand side of the gear box 25 is an extension 40 passingthrough an opening 4| in the inner frame web I0, and having a mountingflange 42 by which said gear box extension is secured to the gear boxwall 38 by means of screw studs 43. The drive shaft 22 passes throughthe rear wall of the gear box extension 40, is journalled in bearings 44in said rear wall, and carbearings 48 in the box walls 31 and 38respectively and has a section of reduced diameter journalled inbearings 5I in the left-hand box wall 28 and passing through said latterwall to the outside of the gear box 25. The outer end of the reducedshaft section carries a hand wheel 52 for .to the take-up main driveshaft 41 between the two gear box plate walls 31 and 38 which drives thegear arrangements enclosed in gear box 25. Said gear arrangementsinclude the drive gear 91 affixed to the projecting part of thecountershaft 94 which is supported in bearings 95 and 96 in the walls 31and 38 respectively. The gear arrangements enclosed in gear box 25 andtheir mode of operation will not be gone into here as such geararrangements are not the basis of the claims of this application and arefully described in the parent application Serial No. 739,004, now PatentNumber 2,518,185, above referred to. The drive gear 91 meshes with anidler gear 98 which is in mesh with the take-up roll gear I6, and issecured to an idler shaft 99 journalled in a bracket I00. The bracketI00 is supported for rotatable adjustment about the countershaft 94 tomaintain the idler gear 98 in mesh with the take-up roll gear I6,irrespective of the elevation of said latter gear.

Means are provided for positively lubricating the gear transmission inthe gear box 25, and for that purpose, the drive shaft 22 carrying thetakeup worm drives a lubricating oil pump I05 mounted in the gear boxextension 40 on the front wall thereof. The lubricating pump I05 isshown of the gear type, and comprises a pair of meshing gears I05,serving as the pumping members, and one of which is fixed to the shaft22 so as to be driven thereby. The pump I05 has an intake I01 leadingfrom the sump section I0Ia of the gear box 25, and has an outlet I08connected to a piping system I09 distributing oil to the differentrotating members of the gear transmission. The oil distribution pipingsystem I09 may be of any suitable type, and may have a manifold H0 atits upper end provided with openings for projecting the oil-downwardlyfrom the top of the transmission. The oil from this manifold H0 willfind its way through the different rotating parts of the transmissionand back into the sump Io1a.

Withtheconstruction described, the box enclosed take-upgear transmissionwill be protected against lint, threads, waste and other foreignsubstances. Moreover, with this encased construction, lubrication of thegears and bearings is effected efl'iciently without creating an untidy,

oily mess around the loom. Furthermore, the transmission structure beingself-contained, it can be mounted or demounted-with respect to the loomframe easily and quickly as a unit.

The transparent window 34 in the gear box 25 permits observation of theinside of said gear bo so that the condition of the lubricating systemin operation can-be observed. It is also possible to determine throughthe transparent window 34 the pick setting of the loom from the positionof the pick change gears. and from the number of teeth thereon, whichwould be marked on the gear.

The construction of the present invention is provided with means fordriving the take-up mechanism in the reverse direction to the extentrequired to efiectthe desired let-back whenever there is an absence ofthe filling, as a-result, for example, of the breakage or exhaust of therunning filling supply. To that end, or for the purpose of manuallypulling the cloth ahead or back, as is necessary in the initial startingof the loom or positioning the fell of cloth, there is a clutch III inthe take-up transmission automatically disengaged upon detection of afailure in the filling. The clutch III is of the ratchet tooth type, andcomprises a clutch element H2 fixed to the take-up worm wheel 46, andmeshing with a complemental clutch element H3 feathered on the take-upmain drive shaft 41 for slidable movement therealong. The take-up maindrive shaft 41 is of a sectional type, and comprises a main hollowsection I I4 on which the clutch member I I3 is splined, and a'section II5 journalled in the hollow of the main shaft section I I4, and securedat one end to the worm Wheel 46.

The clutch element H3 is yieldably urged into drive engagement with theclutch element H2 by means of a coil spring I I1 embracing the mainshaft section I I4, and hearing at one end against a shoulder or collarM8 on said shaft section, and at its other end againstsaid clutchelement H3. V

The disengagement of the clutch I II is effected automatically upondetection of a deficiency in filling by means of a filling feeler slidemechanism H9 which may be of the usual type,- and which is operated whenthe filling breaks, or when the filling is being replenished, to move arod I20 on the inner side of the inside frame web I0 downwardly. The rodI20 is guided for slidable movement and urged upwardly in an inoperativeposition by means of a spring I2I seated on one of the slide sleeveguides I22 ffixed to th inner face of the inside frame web I0, andbearing against a collar I23 secured to said slide rod I26. The sliderod I carries a I blockv I24 which engages on its lower side one end ofa cam lever I25 pivoted at I26-to the front wall ofthe gear boxextension 44 and which is adapted to engage on its upper sidein'theupper limiting position of said slide rod a sleeve rod guide I23 affixedto the inner face of theinside frame web I6. The other end of the leverI25 has a cam conformation I21 engaging a cam follower I28 secured to arock shaft I30 journalled in the front and rear walls of the gear boxextension 46, and carrying inside saidextension a fork. I3I engaging theclutch element H3; and serving-to shift'said member-outof engagementwith the clutch element I'I2- when-the sliderod I20 is depressed, eitherupon filling transfer action, the breakage-of the filling, or for manualoperation.-

The slide rod I26 is automatically: operated from the filling slidemechanism H9; or may be manually operated'by means of afoot pedal I32integral or otherwise secured to the collar I23.

Upon the automatic or manual disengagement of the clutch III in themanner described, the tension of the cloth A' will cause a reverse driveor let-back of the transmissionbeyond saidclutch III without interferingwith the rotation of the drive shaft 22 and the intermeshing gearmembers 45 and 46 thereby.

To control the amount-of let-back, the part of the drive shaft 41extending outwardly through the left-hand wall 28, has aflixed thereto aratchet wheel I cooperating with a pawl or detent I4! pivotally mountedat I42 to an arm I43 supported on said main shaft-41 for swingingmovement thereabout. A spring I45 secured to the arm I43 urges the pawlI4I into engagement with the teeth of the ratchet wheel I46. The lowerend of the arm I43 extends into a slot formed between a bracket I46 andthe wall 28 to which said bracket is affixed. A series of holes I41 areprovided in the bracket I46 for receiving a slack control stud or pinI48.

During normal running operation of the take- 1 up transmission, theratchet wheel I40 is rotating clockwise as shown in Fig. 2, so that thisratchet wheel rides idly past the pawl or detent I4 I. During thisrotation, the frictional engagement of the hub of the arm I43 with thedrive shaft 41 causes the rotation of said arm, until in limitingposition it strikes the end of the bracket I46, as shown in Fig. 2, sothat the rotative position of said arm, and in turn, the position of thepawl MI, is predetermined during normal operating conditions. Upondisengagement of the clutch III, the tension of the cloth causes areverse rotation of the transmission beyond said clutch, and in turn,causes the ratchet wheel I40 to rotate counterclockwise (Fig. 2). Thisrotation of the ratchet wheel causes the engagement of said wheel withthe pawl I4I, and in turn, moves said pawl and the arm I43, until saidarm strikes the stud I48 disposed in one of the holes I41, according tothe amount of let-back desired. When this arm I43 reaches this limitingposition, further reverse rotation of the transmission is stopped.

If it is desired to manually reverse the transmission beyond the clutchIII, this can be easily effected first disengaging clutch III, liftingpallet I56 and by manipulation of the hand wheel 52 in acounterclockwise direction. The counterclockwise rotation of the handwheel causes the transmission to rotate in a reverse direction.

The extent of let-back permittedthrough the hand wheel 52 maybecontrolled independently of the ratchet and pawl device I46. and III!by merely moving the pawl I4I.out*of engagement with the ratchet wheelI46, while; said hand wheel is-being rotated. To facilitate; thismanipulation of the pawl I4I, said pawl has. integral or otherwise rigidthereto a handle. extension I56.

As another feature of thepresentinvention, the take-up roll I2 ismounted in bearings in the inside frame webs In in such a-manner astopermit'said roll to be verticallyadjusted'with respect to the warp line.This elevational adjust,- ment is effected for the'purpose well-known inthe art; For example, in orderyto produce. cover or a'full appearance inthe, cloth,- the :take-up. roll I2 would be raised, and if the warp-istender, it may be desirable to placesaid roll in a lower position, toproduce lessstrainpon the-warp threads.

For roll adjusting purposes; each of the, bear:- ings for the gudgeonsIsiand I5. ofthe takeeup roll 'IZ'oomprises an eccentricbearing housing536 (Figs. 9 and 10) defining achainber for an anti-friction bearingunit I6 I. The bearin housing I63 has a cylindrical section I62 whichpasses through an opening I63 :inthe frame web it with a snug rotativefit, and which is. provided at itsouter end with aradially. outwardflange I64 abutting the outer face of :said frameweb. The inner. end ofthe bearing housing I55 is closed by a cover I65, which .is fastened tosaid housing by bolts I63; and which has a cylindrical section I61similar to and abutting, the cylindrical section I62 of said bearinghousing I69. and a radially outward flange I68. Secured to the innerface of the frame, web, I 6 by welding or the like is a shim plateIliihaving a circular opening I'II of the same, size as and in registrywith the opening I63 in the frame web Ill. The

shim plate I16 extends around; the cylindrical sections I62 and I-61 ofthe bearing housing I66 and its cover I65, and is engaged by the flangeI68 on said cover. The openingein bearing ,housing I66 and its coverI65, through which the gudgeon I4 or IE extends, iseccentric withrespect to the cylindrical sections I62 and I61 of said members, so thatupon adjusting rotation of said cylindrical sections in the alignedopenings I63 and HI of the frame web I0 and shim plate I10, theelevation of said gudgeon will be varied.

The eccentric bearing housing members I66 and IE5 are maintained inadjusted rotative position by means of a clamp I12 removably secured tothe frame web I6 and to the shim plate I16 by means of a cap screw orstud I13, and having a lip I14 bearing against a peripheral section ofthe bearing housing cover I35 in tightened position of said clamp.

When it is desired to adjust the elevation of the takeup roll I2, thestuds I13 at each end, are loosened to release clamping pressure on thebearing units I60, I65, and said units are rotated in the openings I63and ill to change the elevation of the gudgeons I4 or I5, and in turn,the elevation of said take-up roll I2. Thetwo eccentric bearing unitsI66, I65 on opposite sides of the take-up roll I2 are adjusted to thesame extent as determined, for example, by a spirit level, and when saidroll has been elevated to the desired position, said bearing units areclamped in ad- 7 justed position by tightening the clamp studs I13.

As the elevation of the take-up roll I2 is adjusted, the elevationalposition of the take-up roll gear I6 with respect to the idler gear 98is also changed. It is therefore necessary to move the idler 98 intomesh with the take-up roll gear IS in its adjusted position. For thatpurpose, the idler 98 is carried on the adjustable bracket I supportedon the countershaft 94 of the takeup gear transmission for rotatableadjustment thereabout. The bracket I00 includes two plates I80 and I8]secured together by means of bolts I83 passing through spacer sleevesseparating said plates, and is held in adjusted position by means of aclamp I84 bearing against the bracket plate I89 and fastened by a screwstud I85 to the righthand wall 38 of the gear box 25. By loosening thestud I85, and thereby loosening the bracket I00, said bracket may berotated to bring the idler gear 38 into mesh with the take-up roll gear[6, irrespective of the elevation thereof.

As many changes can be made in the above apparatus, and many apparentlywidely different embodiments of this invention can be made withoutdeparting from the scope of the claims, it is intended that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. In a take-up mechanism for a loom, a take-up gear transmissionincluding a take-up main drive shaft, and a drive to said shaftincluding a clutch disengageable to permit letback operations under thetension action of the cloth, a casing for said transmission on one sideof the loom, said take-up main drive shaft extending in said casingandprojecting outwardly through the outer side wall of said casing, anda let-back control device on the outer side of said outer casing walladjustable to control the extent of cloth let-back and comprising aratchet wheel on the outward projecting section of said take-up maindrive shaft.

2. In a take-up mechanism for a loom, the combination as described inclaim 1, in which said clutch is of the unidirectional typeautomatically disengaged upon rotation of said takeup main drive shaftin let-back direction, said combination including a handle on theoutward projecting section of said take-up main drive shaft'manipulableto effect reverse rotation of said latter shaft, said let-back controldevice being adapted to be manipulated into inoperative position topermit let-back operation through said handle independently of saidlet-back control device.

3. In a take-up mechanism for a loom, a takeup gear transmissionincluding a take-up main drive shaft and a drive to said shaft includinga unidirectional clutch automatically disengaged upon rotation of saiddrive shaft in let-back di rection, and automatically disengaged upondetection of absence of filling to permit let-back operations under thetension action of the cloth, a casing for said transmission on one sideof the loom, said drive shaft extending in said casing and projectingoutwardly through the outer side wall of said casing, ahandle on theoutward projecting section of said drive shaft manipulable to effectrotation thereof, and a let-back control device on the outer side ofsaid outer casing wall operating on said drive shaft to control theextent of cloth let-back and manipulable into inoperative position topermit let-back operation through said handle independently of saidletback control device.

JOHN RINNE.

EVERETT I-I. ASHTON. ROBERT G. MALLARD. FRANCIS GERARD LAKE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name 7 Date 743,584 Stimpson Nov. 10, 19031,647,234 La Chapelle Nov. 1, 1927 1,794,420 Robellard Mar. 3, 19311,911,981 Wiget May 10, 1933 2,185,063 Pugh Dec. 26, 1939 2,533,128Mallard et a1. Dec. 5, 1950

